Pith Number

pith:OTLULXA4

pith:2007:OTLULXA4KBX4EK6KCECGJLUBER

not attested not anchored not stored refs pending

Discovery of Probable Relativistic Fe Emission and Absorption in the Cloverleaf Quasar H 1413+117

E. Agol, G. Chartas, M. Eracleous, S. Gallagher, X. Dai

arxiv:astro-ph/0702742 v2 · 2007-02-28 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OTLULXA4KBX4EK6KCECGJLUBER}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:29:06.165347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74d745dc1c506fc22bca110464ae8124793363422ef36b2ea14e099c42b5616e

Aliases

arxiv: astro-ph/0702742 · arxiv_version: astro-ph/0702742v2 · doi: 10.48550/arxiv.astro-ph/0702742 · pith_short_12: OTLULXA4KBX4 · pith_short_16: OTLULXA4KBX4EK6K · pith_short_8: OTLULXA4

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OTLULXA4KBX4EK6KCECGJLUBER \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 74d745dc1c506fc22bca110464ae8124793363422ef36b2ea14e099c42b5616e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ac1426cee84441ee2cffeaef11c90faf21122f694ea523a78ae236b220716d6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-02-28T16:16:34Z",
    "title_canon_sha256": "299a1a8936aa5316bdefe4c5ce7fbfc8c4bea81aecf4be5ae18798fd3e0a29aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0702742",
    "kind": "arxiv",
    "version": 2
  }
}